namespace bt {
    export class Tick {
        tree: BehaviorTree;
        debug: any;
        target: any;
        blackboard: Blackboard;
        _openNodes: BaseNode[] = [];
        _nodeCount: number = 0;
    
        constructor() {
            this.tree       = null;
            this.debug      = null;
            this.target     = null;
            this.blackboard = null;
            this._openNodes  = [];
            this._nodeCount  = 0;
        }
    
        _enterNode(node: BaseNode) {
            this._nodeCount++;
            this._openNodes.push(node);
            // this.target.onEnter(node);
        }
    
        _openNode(node: BaseNode) {
            // this.target.onOpen(node);
        }
    
        _tickNode(node: BaseNode) {
            // this.target.onTick(node);
        }
    
        _closeNode(node: BaseNode) {
            this._openNodes.pop()
            // this.target.onClose(node);
        }
    
        _exitNode(node: BaseNode) {
            // this.target.onExit(node);
        }
    }
}